Identification
A long black day is followed by a Doji that gaps in the direction of the
trend. The third day is a white day which closes in the top half of the
black day.

The Psychology
In a downtrend or during a pullback within an uptrend, the market gaps
down but does not continue its downward movement. Instead enough bulls
step up to bring supply and demand back into equilibrium and the stock
churns in place. This is the bullish Doji Star formation. A subsequent
follow through gap up that closes above the midpoint of the black day
completes the Morning Doji Star and confirms the reversal.

AMH rallied nicely on solid volume before trending sideways and establishing support at around 27. Then a bullish Morning Doji Star formed, volume picked up, and the stock continued to move up. Although Morning Doji Star formations are considered reversal patterns, their reliability increases significantly if you play them at support.